.cp-container {
	min-height: 100vh;
	background: #f5f5f5;
	padding: 0;
}

.cp-top {
	height: 120px;
	background: url('../images/bg/cooperation-bg.jpg') center/cover;
	margin-bottom: 20px;
}

.cp-content {
	max-width: 1200px;
	margin: -30px auto 0;
	padding: 0 20px;
	position: relative;
	z-index: 1;
}

.cp-title {
	text-align: center;
	margin-bottom: 20px;
}

.cp-title h1 {
	font-size: 30px;
	color: #333;
	margin: 10px 0;
}

#form-wrap {
	background: #fff;
	padding: 25px 40px;
	border-radius: 10px;
	box-shadow: 0 0 20px rgba(0,0,0,0.1);
	margin-bottom: 30px;
}

.form-header {
	text-align: center;
	margin-bottom: 25px;
}

.form-header h2 {
	color: #579a47;
	font-size: 26px;
	margin-bottom: 15px;
}

.form-header p {
	color: #666;
	line-height: 1.6;
}

.form-group {
	margin-bottom: 25px;
	position: relative;
}

.form-group label {
	display: block;
	position: absolute;
	left: 12px;
	top: 50%;
	transform: translateY(-50%);
	color: #666;
	font-family: '华文中宋', '宋体';
	transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
	background: #fff;
	padding: 0 5px;
	pointer-events: none;
	z-index: 1;
}

.form-group input,
.form-group textarea {
	width: 100%;
	padding: 12px;
	border: 2px solid #ddd;
	border-radius: 5px;
	font-size: 14px;
	transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
	background: transparent;
	position: relative;
	z-index: 0;
}

.form-group textarea {
	height: 150px;
	resize: vertical;
	min-height: 150px;
	max-height: 300px;
}

.form-group input:focus,
.form-group textarea:focus {
	border-color: #579a47;
	outline: none;
	box-shadow: 0 0 0 3px rgba(87, 154, 71, 0.1);
}

.form-group input:focus ~ label,
.form-group textarea:focus ~ label,
.form-group input:not(:placeholder-shown) ~ label,
.form-group textarea:not(:placeholder-shown) ~ label {
	top: 0;
	font-size: 12px;
	color: #579a47;
	transform: translateY(-50%);
	z-index: 2;
}

/* 调整textarea的label位置 */
.form-group textarea ~ label {
	top: 25px;
}

.form-group textarea:focus ~ label,
.form-group textarea:not(:placeholder-shown) ~ label {
	top: 0;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
	color: transparent;
}

.form-group input:focus,
.form-group textarea:focus {
	border-color: #579a47;
	box-shadow: 0 0 0 3px rgba(87, 154, 71, 0.1);
	outline: none;
}

.form-group textarea {
	height: 150px;
	resize: vertical;
	min-height: 150px;
	max-height: 300px;
}

/* 添加输入框动效 */
.form-group input:focus,
.form-group textarea:focus {
	transform: translateY(-2px);
}

.submit-btn {
	background: #579a47;
	color: white;
	padding: 12px 35px;
	border: none;
	border-radius: 8px;
	font-size: 16px;
	cursor: pointer;
	transition: all 0.3s ease;
	position: relative;
	overflow: hidden;
}

.submit-btn:hover {
	background: #467a39;
	transform: translateY(-2px);
	box-shadow: 0 5px 15px rgba(87, 154, 71, 0.3);
}

.submit-btn:active {
	transform: translateY(0);
}

/* 添加波纹效果 */
.submit-btn::after {
	content: '';
	position: absolute;
	top: 50%;
	left: 50%;
	width: 0;
	height: 0;
	background: rgba(255, 255, 255, 0.2);
	border-radius: 50%;
	transform: translate(-50%, -50%);
	transition: width 0.6s ease-out, height 0.6s ease-out;
}

.submit-btn:active::after {
	width: 200px;
	height: 200px;
	opacity: 0;
}

/* 输入验证反馈 */
.form-group.success input,
.form-group.success textarea {
	border-color: #28a745;
}

.form-group.error input,
.form-group.error textarea {
	border-color: #dc3545;
}

/* 错误提示 */
.form-group .error-message {
	display: none;
	color: #dc3545;
	font-size: 12px;
	margin-top: 5px;
	position: absolute;
	bottom: -20px;
	left: 12px;
}

.form-group.error .error-message {
	display: block;
}

/* 添加输入框图标 */
.form-group.with-icon {
	position: relative;
}

.form-group.with-icon input {
	padding-left: 40px;
}

.form-group.with-icon i {
	position: absolute;
	left: 12px;
	top: 50%;
	transform: translateY(-50%);
	color: #666;
	transition: color 0.3s ease;
}

.form-group.with-icon input:focus ~ i {
	color: #579a47;
}

/* 响应式调整 */
@media (max-width: 768px) {
	.form-group label {
		font-size: 14px;
	}
	
	.form-group input,
	.form-group textarea {
		font-size: 14px;
		padding: 10px 12px;
	}
	
	.form-group input:focus ~ label,
	.form-group textarea:focus ~ label,
	.form-group input:not(:placeholder-shown) ~ label,
	.form-group textarea:not(:placeholder-shown) ~ label {
		font-size: 12px;
	}
}

/* 响应式设计 */
@media (max-width: 768px) {
	.cp-container {
		padding: 30px 0;
	}
	
	#form-wrap {
		padding: 20px;
	}
	
	.form-header h2 {
		font-size: 24px;
	}
}

/* 在现有样式后添加信封动画相关样式 */

.envelope-wrapper {
	position: fixed;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	background: rgba(87, 154, 71, 0.15);
	display: none;
	justify-content: center;
	align-items: center;
	z-index: 1000;
	backdrop-filter: blur(5px);
}

.envelope-wrapper.show {
	display: flex;
	animation: fadeIn 0.4s ease-out;
}

.envelope {
	position: relative;
	width: 300px;
	height: 200px;
	background: #fff;
	border-radius: 10px;
	transform-style: preserve-3d;
	perspective: 1000px;
	box-shadow: 0 0 20px rgba(87, 154, 71, 0.2);
	border: 2px solid #579a47;
	overflow: hidden;
}

/* 添加信封正面样式 */
.envelope-front {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	background: #fff;
	z-index: 4;
	opacity: 0;
	display: flex;
	flex-direction: column;
	justify-content: center;
	align-items: center;
	padding: 20px;
	transform: translateY(100%);
}

.envelope-front .stamp {
	position: absolute;
	top: 20px;
	right: 20px;
	width: 50px;
	height: 60px;
	background: rgba(87, 154, 71, 0.1);
	border: 1px dashed #579a47;
	border-radius: 4px;
	display: flex;
	justify-content: center;
	align-items: center;
	font-size: 24px;
	color: #579a47;
}

.envelope-front .postmark {
	position: absolute;
	top: 25px;
	right: 80px;
	width: 60px;
	height: 60px;
	opacity: 0.6;
}

.envelope-front .address {
	text-align: center;
	margin-top: 20px;
	font-size: 14px;
	color: #333;
	line-height: 1.6;
}

.envelope-front .address p {
	margin: 5px 0;
}

.envelope-front .seal {
	position: absolute;
	bottom: 20px;
	right: 20px;
	width: 40px;
	height: 40px;
	background: #579a47;
	border-radius: 50%;
	display: flex;
	justify-content: center;
	align-items: center;
	color: white;
	font-size: 12px;
	transform: rotate(-15deg);
	opacity: 0.8;
}

/* 修改信封动画 */
.envelope-wrapper.show .envelope-front {
	animation: showFront 0.8s ease-out 2.3s forwards;
}

@keyframes showFront {
	0% {
		opacity: 0;
		transform: translateY(100%) scale(0.9);
	}
	50% {
		opacity: 1;
		transform: translateY(0) scale(1.05);
	}
	100% {
		opacity: 1;
		transform: translateY(0) scale(1);
	}
}

/* 修改信件插入动画时间 */
.envelope-wrapper.show .letter {
	animation: insertLetter 1.5s ease-out forwards;
}

@keyframes insertLetter {
	0% {
		transform: translate(-50%, 100%) scale(1);
		opacity: 0;
	}
	20% {
		transform: translate(-50%, -100%) scale(1);
		opacity: 1;
	}
	40% {
		transform: translate(-50%, -50%) scale(1) rotate(0deg);
		opacity: 1;
	}
	60% {
		transform: translate(-50%, -50%) scale(0.9) rotate(5deg);
		opacity: 1;
	}
	80% {
		transform: translate(-50%, -30%) scale(0.8) rotate(0deg);
		opacity: 0.8;
	}
	100% {
		transform: translate(-50%, 0%) scale(0.8);
		opacity: 0;
	}
}

.envelope-flap {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	background: linear-gradient(135deg, #579a47, #467a39);
	clip-path: polygon(0 0, 50% 50%, 100% 0);
	transform-origin: top;
	transition: transform 0.5s ease-out;
	border-radius: 10px 10px 0 0;
	z-index: 3;
}

.envelope-back {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	background: #fff;
	border-radius: 10px;
	z-index: 1;
}

.envelope-content {
	position: relative;
	width: 100%;
	height: 100%;
	background: #fff;
	overflow: hidden;
	border-radius: 8px;
	z-index: 2;
}

.letter {
	position: absolute;
	top: 50%;
	left: 50%;
	width: 80%;
	background: #fff;
	padding: 25px;
	transform: translate(-50%, -50%);
	text-align: center;
	box-shadow: 0 0 15px rgba(87, 154, 71, 0.1);
	border-radius: 8px;
	border: 1px solid rgba(87, 154, 71, 0.2);
	z-index: 2;
}

.letter-content {
	color: #333;
	font-size: 16px;
	line-height: 1.6;
}

.letter-content p:first-child {
	color: #579a47;
	font-size: 20px;
	font-weight: bold;
	margin-bottom: 10px;
}

.letter-content p:last-child {
	color: #666;
	font-size: 15px;
}

/* 动画关键帧 */
@keyframes fadeIn {
	from { 
		opacity: 0;
		backdrop-filter: blur(0px);
	}
	to { 
		opacity: 1;
		backdrop-filter: blur(5px);
	}
}

.envelope-wrapper.show .envelope-flap {
	animation: foldFlap 1.2s ease-out 0.8s forwards;
}

.envelope-wrapper.show .letter {
	animation: insertLetter 1.5s ease-out forwards;
}

@keyframes foldFlap {
	0% { 
		transform: rotateX(0deg);
		background: linear-gradient(135deg, #579a47, #467a39);
	}
	100% { 
		transform: rotateX(180deg);
		background: linear-gradient(135deg, #467a39, #579a47);
	}
}

.submit-btn.sending {
	pointer-events: none;
	opacity: 0.7;
}

.submit-btn.sending::after {
	content: '';
	position: absolute;
	top: 50%;
	left: 50%;
	width: 20px;
	height: 20px;
	margin: -10px 0 0 -10px;
	border: 2px solid rgba(255, 255, 255, 0.3);
	border-top-color: #fff;
	border-radius: 50%;
	animation: spin 0.8s linear infinite;
}

@keyframes spin {
	to {
		transform: rotate(360deg);
	}
}

/* 响应式调整 */
@media (max-width: 768px) {
	.envelope {
		width: 280px;
		height: 180px;
	}
	
	.letter {
		width: 85%;
		padding: 20px;
	}
	
	.letter-content p:first-child {
		font-size: 18px;
	}
	
	.letter-content p:last-child {
		font-size: 14px;
	}
}

/* 添加轻微的悬浮动画 */
.envelope-wrapper.show .envelope {
	animation: floatEnvelope 2s ease-in-out infinite;
	animation-delay: 3.1s;
}

@keyframes floatEnvelope {
	0%, 100% {
		transform: translateY(0);
	}
	50% {
		transform: translateY(-10px);
	}
}